AM8017 Module - Digital Reverb
Overview The original
ARP 2600 uses a spring reverb as its in built effects unit. My FracRac 2600 replica clearly needed a reverb unit but I was reluctant to build a spring reverb as I don't like the sound that much....so I have built a digital reverb using
the MN3011 BBD chip and the melding of the ARP Reverb panning circuit and the Digisound 80-17 module. More info on the 80-17 is here.
AM8017 Design I have used the core Digisound design (which is essentially the same as the MN3011 Datasheet) and added most of the mixing
and panning functionality of the ARP 2600. So this reverb module has stereo outs and a pan control, as well as individual reverb levels for RIGHT and LEFT.
MN3011 IC has six tapped delays with the longest delay available being 166mS. This gives a useful reverberation time of about 3 seconds. The reverberated bandwidth is limited to 3.6 kHz (about the same as spring lines) and, to
compensate for this, the original signal is mixed with the treated signal. A major advantage of this chip is the ability to vary the reverberation time.
The AM8017 Digital Reverb has the following front panel controls:
There are six 3.5mm jack sockets mounted on the left hand side of the panel, these are:
x2 Pre-Reverb Signal Inputs
x2 Post Reverb Signal Inputs
Reverb Output Left and Right